http://wh40k.lexicanum.com/wiki/Grendel's_World#.UxhrbRB_u9E

Okay, so I will be destroyed by planet without any population?

Ok lemme try this...

http://wh40k.lexicanum.com/wiki/Castellan_Sentry_Gun_Defence_Force#.UxhvNoVWFno

Got shot by 10 Tarantulas...God damn...

http://www.dakkadakka.com/dakkaforum/posts/list/219374.page

http://wh40k.lexicanum.com/wiki/Adeptus_Custodes#.UxkJBfl_uwQ

Apparently I must have thrown off the Emperor's groove at some point. Probably when I switched to World Eaters.

Mental note created

http://wh40k.lexicanum.com/wiki/Soul_Drinkers_(Novel_Series)#.UxmzLhB_u9E

Eh, another book. Or a series actually! Seven books, darn it.
I didn't know these can be so lethal
*goes a little further away from bookshelf*

http://wh40k.lexicanum.com/wiki/Tarentus#.Uxm2Kvl5Mik

Okey, so I probably get killed by a random ultrasmurf/smurfy PDF in an attempt to steal some vegetables. How glorious...

I tried it on http://warhammer40k.wikia.com/wiki/Warhammer_40k_Wiki and it gave me http://warhammer40k.wikia.com/wiki/Lascannon

I think that you can't get killed by an author or his book there (if not by Roboute Guilliman and his Codex Astartes, but at least this could make sense)

i just fell out my chair with laughter.

also im killed by an exterminator...cooked from the inside.

http://wh40k.lexicanum.com/wiki/Exterminator_(Weapon)#.Uxm694VG7Y8

edit:
so what would be the order of overkill of the following things?
a chaos god
a c'tan
one of every titan/every titan weapon
exterminatus
matt ward
CS:Goto

No I think I owed him money.